package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorsMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorsMapper dishFlavorsMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dish.setStatus(StatusConstant.ENABLE);
        dishMapper.insert(dish);

        //获取插入后的菜品id
        Long dishId = dish.getId();
        //向菜品表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0) {
            flavors.forEach((item) -> {
                item.setDishId(dishId);
            });
            dishFlavorsMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO){
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //1.检查当前菜品是否能够删除，如果当前菜品能够删除，再执行删除操作
        for (Long id : ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //2.判断菜品是否存在套餐中，如果存在，抛出一个异常
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


//        for (Long id : ids){
//            //3.删除菜品表中的数据
//            dishMapper.deleteBatch(id);
//            //4.删除口味表中的数据
//            dishFlavorsMapper.deleteByDishId(id);
//        }

        //根据id集合删除菜品表中的数据
        //delete from dish where id in (?,?,?)
        dishMapper.deleteBatchs(ids);

        //根据id集合删除口味表数据
        //delete from dish_flavor where dish_id in (?,?,?)
        dishFlavorsMapper.deleteByDishIds(ids);

    }


    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getById(Long id) {
        //1.根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //2.根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorsMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }


    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
        //1.修改dish表中的数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        //2.修改dish_flavor表数据
        dishFlavorsMapper.deleteByDishId(dishDTO.getId());
        //3.插入dish_flavor表数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach((item) -> {
                item.setDishId(dishDTO.getId());
            });
            dishFlavorsMapper.insertBatch(flavors);
        }
    }


    /**
     * 启用禁用菜品
     * @param status
     * @param id
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


    @Override
    public List<DishVO> listVO(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);
        List<DishVO> dishVOList = new ArrayList<>();
        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);
            List<DishFlavor> dishFlavorList = dishFlavorsMapper.getByDishId(d.getId());
            dishVO.setFlavors(dishFlavorList);
            dishVOList.add(dishVO);

        }
        return dishVOList;
    }
}
